Manufacture of cartons



A. R. R IDDERSTROM MANUFACTURE OF CARTONS Dec. 24, 1940.

Filed Jan. 15, 1940 Patented Dec. 24, 1940 2,226,181

UNITED, STATES PATENT OFFICE MANUFACTURE OF CARTONS Andrew R.Ridderstrom, Nahant, Mass., assignor to Prime Manufacturing Company,Lynn, Mass, a corporation of Massachusetts Application January'l3, 1940,Serial No. 313,709

2 Claims. (CI. 93-56) This invention relates to the manufacture of Figs.2. 3 and 4 are views in side elevation 11- cartons, such as shoe boxes,from scored blanks lustrating successivesteps of the process,

of cardboard or similar sheet material. The in- Fig. 5 is an enlargedfragmentary sectional vention consists in an improved process ofapplyview of the bond produced. 5 ing a reinforcing tape and cord to theblank. It The process of my invention may be carried 5 also includeswithin its scope the improved blank out by suitably modifying anycommercial tape herein shown as produced by the process of my applyingmachine now available, such, for exinvention. ample, as that shown in myprior Patent No.v

It has been the practice heretofore to apply 2,175,618, granted October10, 1939. Reference strips of adhesive tape to those parts of the may behad to that patent for further descrip- 10 blank which are to beincluded in the corners or tion of the organization of the entiremachine.

fold lines of the cartons, and in some instances Only so much of it isherein shown as is reto enclose a cord or thread within or beneath thequ ed for an understanding of the process 1 e tape. I have discoveredthat improved results p ese i ve tio l5 can be secured by pressingadhesive or adhesively The carton blank 20 to be reinforced or a p0secured tape and cord together upon the surface tion thereof is arrangedto be fed over the cirof the blank by means of a corrugating tool, thuscumference of a smooth pp roll I 0 which at the same time forming alongitudinal corruy be ed r e rotation up n a stud gation in the blankbeneath the tape in which the Above t smo r n is provided ,a roll cordis embedded, and flattening the tape uppn I! mounted on a driven shaftl3 and provided on 20 the blank and embedding its fibres thereinto byits circumference with a series of losely arproducing a series ofclosely arranged transverse ranged transverse corrugating. ribs Thesecorrugations. In the first place, I find that by ribs have a fairlysharp vertex lme, sharp e u h using a corrugating tool or roll theadhesive gum to indent Substantially material but 1101;

of the tape is actually squeezed into the bodyof Sharp enough toProvision not herein 25 the underlying blank and a particularly secureShown, is made f adiustably regulating the re]- adhesive bond is thussecured In the second ative position of the rolls l0 and 12 to controlplace, the tape is flattened and ironed upon the pressure efierted uponthe workblank so that its apparent'thickness is reduced The remforcing Pwhich as herein and it lies so closely upon the surface of the blankshDwn is to apphed to surface of the 30 that it causes no obstruction tothe passage of blank. compnses an adheslve tape 23 blanks at high speedin an automatic machine practlce may be about 1A" wide and when has Inthe third place, I find that a corrugated i secured to its adhesivesurface a reinforcing cord does not tend to pick up and pack withadhesive or threat: I t i cord 15 laid upon the tape as gum from thetape as is the case when a smooth g i 6 h i a the conibmed tape and rollis employed. The further advantage which i gfig i g g f'g g z ggg 3 iflows from this condition is that in automatic contain 1 000 yardsThgothread carrying machmes the roll pressure may be substantially isguided to the bite of the 1.0115 In and n by a 4 reduced, as compared tothe pressure heretofore ysmau feed mu H which is arranged to engage 40required when smooth rolls have been used, and the tape against thesurfaae of the Smooth 1-011 Still produce an improved adhesive bond. walong a line a t t n behind t Furthermore, by impressing into theadhesive ribbed u A pair f flngefs 5 and are tape a series of closelyarranged transverse corarranged, at the prope'r t in the cycle of trugations the presence of the cord beneath the machine, t engage the endof the cord c y tape is masked and 8 somewhat ornamental 8560i; tape, asshown in Fig, 2, and advance it 1,0 the is imparted to h exposed f e ofthe 9 position shown in Fig. 3 whereupon the end of These and otheradvantages of the invention th tape is caught by the feed roller l4 andcar. will be best understood a d app c om rledforwardly beneath theribbed roll 12. In the following description of a preferred manner thisoperation, as already explained, the ribs of 50 of putting itintopractice as illustrated in the th roll I! iron the tape firmly uponthe surface accompanying drawing in which, of the blank 20, forcing itinto the body of the Fig. 1 is a view in perspective showing portionsblank'in a series of transverse corrugations, and of a box blank havinga cord and overlying tape also forcing the cord 2l'to make a groove foritapplied thereto by a corrugating roll, self beneath the tape 23 sothat it becomes sub- 55 stantialiy embedded in the body of the blank.When a suflicient length of cord carrying tape has been applied in themanner thus explained, a cutting-off knife I1 is operated as shown inFig. 4 to sever the tape and cord. This occurs after the fingers l5 andI8 have been moved upwardly and rearwardly out of the path of the knifeH. The parts of the machine are then returned to initial position inreadiness for a new cycle.

The cord-carrying tape may be applied to any desired part of the blanksfor the carton or carton cover. As shown in Fig. 1 it spans a crease 2|which is formed in the blank to determine the fold line of one of itsside walls. The cordcarrying tape does not, of course. in any wayinterfere with the subsequent folding of the carton blank but doesreinforce the blank at the fold line against any danger of breakage.

The process and the resulting product will be better understood byreference to Fig. 5 of the drawing wherein the cord 24 is illustrated asembedded into the material of the blank 20 longitudinally of the tape,and the fibres of the tape are embedded into the blank along closely arranged lines extending transversely of the tape and resulting from thecorrugating pressure of the roll I! thereon. The reinforced box blankherein disclosed as produced by the process of my invention is notherein claimed, but is-the subject matter of my copending application,Ser.

No. 339,618, filed June 10, 1940. Having thus described my inventionwhat I claim as new and desire to secure by Letters Patent of the UnitedStates is,

1. The process of reinforcing box blanks, which includes the steps ofpressing an adhesive tape and an underlying cord upon the surface of ablank by means of a ribbed corrugating tool, em- .bedding the cord intothe blank beneath the tape, flattening the tape upon and into adhesivecontact with the blank, and producing transverse 15 corrugations ln thetape'substantially masking the cord beneath it.

- 2. The process of reinforcing box blanks, which consists insimultaneously laying on the blank a cord and an adhesive tape coveringthe cord, and

CERTIFiCA'I'E OF CORREQTION- Patent No. 2,226,181. I December 21;,19h0.

ANDREW R. 'RIbDERs'mou. It is hereby certified that eri'orappears in theprinted specification of the abovenuinbered patent reqpiring ebrrectionaa-follofis: Page 2', second column, line '21, claim 2, after "and".insert --tape-; and that the said Letters Patent should be read withthiscorrection therein that the samemay-confem to tnereeojrdef the easeit the Patent Office.

Signed ahd' sealed this 28th day of Jamar- 1. D. 19M.

Henry" Van A;'sdfil;," (Seal) Acting ()ommissiomer 6! Patents.

